21920070513 has 32 divisors (see below), whose sum is σ = 32974479360. Its totient is φ = 12837576960.

The previous prime is 21920070509. The next prime is 21920070527. The reversal of 21920070513 is 31507002912.

It is not a de Polignac number, because 21920070513 - 2² = 21920070509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21920070533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33081 + ... + 211977.

It is an arithmetic number, because the mean of its divisors is an integer number (1030452480).

Almost surely, 2^21920070513 is an apocalyptic number.

It is an amenable number.

21920070513 is a deficient number, since it is larger than the sum of its proper divisors (11054408847).

21920070513 is a wasteful number, since it uses less digits than its factorization.

21920070513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179037.

The product of its (nonzero) digits is 3780, while the sum is 30.

The spelling of 21920070513 in words is "twenty-one billion, nine hundred twenty million, seventy thousand, five hundred thirteen".